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Smart Tax Assistance

Tauri v2 desktop application with Rust backend — PDF extraction, OCR, bank processing, and multi-device sync.

§ 01

Smart Tax Assistance — Architecture

Tauri v2 Desktop Application

v0.13.0

Smart Tax Assistance is a Tauri v2 desktop application with a Rust backend and vanilla JS frontend. It provides PDF extraction, bank statement processing, e-Faktur parsing, and OCR capabilities.

System Architecture

┌────────────────────────────────────────────────┐
│           Tauri v2 Desktop Application          │
│                                                 │
│  ┌──────────────┐    IPC    ┌────────────────┐ │
│  │  Frontend     │◄────────►│  Rust Backend  │ │
│  │  Vanilla JS   │  invoke  │  27 Commands    │ │
│  │  Vite 6       │          │  9 Modules      │ │
│  │  fectral CSS  │          │  5 Extractors   │ │
│  └──────┬───────┘          └───────┬────────┘ │
│         │                          │           │
│  ┌──────▼──────────────────────────▼────────┐  │
│  │  External Binaries                       │  │
│  │  Tesseract OCR · pdftoppm                │  │
│  │  PP-OCRv5 (MNN models)                   │  │
│  └──────────────────────────────────────────┘  │
└────────────────────────────────────────────────┘

Frontend Boot Chain

main.js (entry)
  ├─ feature-module-loader.js
  │    ├─ Phase 1: Critical (sequential)
  │    │    ├─ welcome-screen.js
  │    │    └─ app-shell.js
  │    └─ Phase 2: Non-critical (parallel)
  │         ├─ extractor, renamer, settings
  │         ├─ scans-guide, dev-pages
  │         └─ downloader, rekening-side-panel
  └─ frontend-boot-orchestrator.js
       ├─ auto-discover server
       ├─ startup validation
       └─ dashboard init

§ 02

Desktop Application

Feature Modules

Module	Lines	Purpose
app-shell.js	345	Main orchestrator
navigation-controller.js	421	SPA routing (12 pages)
feature-module-loader.js	—	2-phase loading
module-bridge.js	—	Cross-module registry
css-lazy-loader.js	—	On-demand CSS loading

11 Main Pages

DashboardAnggotaPengumumanAgendaExtractorExcelScanRenamerDownloaderSettingsFood

Rust Backend Modules

Module	Purpose	Status
exports/	Excel combine & save	Active
auth/	Google OAuth2 PKCE + sessions	Active
health/	Tesseract/Poppler health checks	Active
monetization/	Subscription + CORS proxy	Active
pdf_renamer/	Batch PDF rename with OCR	Active
processing/	Main PDF processing entry	Active
security/	HPKE key management	Active
settings/	AES-256-GCM encrypted config	Active
ocr_overlay/	Real-time OCR overlay	Inactive

§ 03

STA Design System

fectral Theme — Brand DNA

The STA design system is built from analysis of 73 DESIGN.md files. Four brands form the DNA:

Brand	What We Take
Linear	Surface ladder, hairline borders, no-drop-shadow elevation
VoltAgent	Single green accent, accent-dim/soft/bright tier
Warp	Warm dark surfaces, terminal-inspired mono typography
Raycast	Command-palette quality, eyebrow labels, micro-interactions

Surface Ladder (6 Steps)

Token	Dark Mode	Purpose
surface-0	#0e0e14	Canvas / main background
surface-1	#141419	Card background
surface-2	#1b1b22	Card hover background
surface-3	#232330	Sidebar, input background
surface-4	#2c2c3a	Elevated surface
surface-5	#383848	Highest surface

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